Polyurethane elastomers and shaped articles prepared therefrom
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United States of America Patent
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May 8, 2007
Grant Date -
Nov 29, 2001
app pub date -
Mar 8, 2001
filing date -
Mar 9, 2000
priority date (Note) -
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Abstract
Disclosed herein are polyurethane elastomers and shaped articles prepared therefrom comprising charge-control agents to provide electrical conductivity to the elastomers, thereby allowing for their use in electrophotographic processes. The elastomers comprise a polyisocyanate prepolymer, a polyether prepolymer, and a hardener mixture comprised of at least one additional polyol and a charge-control agent. When used in an electrophotographic process, the elastomers are capable of exhibiting resistivities of less than 6.times.10.sup.9 ohm-cm for 600,000 images or more.
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